Dana Royer and Ellen Thomas are among the 21 authors of a review paper, "The Geological Record of Ocean Acidification," published in Science, March 2012: Vol. 335, no. 6072, pages 1058-1063. In the paper, the authors review events exhibiting evidence for elevated atmospheric CO2, global warming, and ocean acidification over the past 300 million years of Earth’s history, some with contemporaneous extinction or evolutionary turnover among marine calcifiers. Ocean acidification may have severe consequences for marine ecosystems; however, assessing its future impact is difficult because laboratory experiments and field observations are limited by their reduced ecologic complexity and sample period, respectively. Royer is…